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Data Analyst - Live Operations
With food at the core of the business, Glovo delivers any product within your city at any time of day. Our vision and ambition are not only to make everything immediately available in your city but it is also to offer our employees the job of their lives. A job where you'll be challenged and have the most fun working in through tech-enabled experiences. Your work-life opportunity: Glovo (glovoapp.com) is looking for a passionate, proactive, data-driven and hands-on professional to support our Live Operations Strategy & Analytics department in our headquarters in Barcelona. You will be the reporting and analytical point of contact for our Live Operations department helping provide an excellent and efficient service.
A Negation Quantum Decision Model to Predict the Interference Effect in Categorization
Categorization is a significant task in decision-making, which is a key part of human behavior. An interference effect is caused by categorization in some cases, which breaks the total probability principle. A negation quantum model (NQ model) is developed in this article to predict the interference. Taking the advantage of negation to bring more information in the distribution from a different perspective, the proposed model is a combination of the negation of a probability distribution and the quantum decision model. Information of the phase contained in quantum probability and the special calculation method to it can easily represented the interference effect. The results of the proposed NQ model is closely to the real experiment data and has less error than the existed models.
Quaternion Generative Adversarial Networks
Grassucci, Eleonora, Cicero, Edoardo, Comminiello, Danilo
Latest Generative Adversarial Networks (GANs) are gathering outstanding results through a large-scale training, thus employing models composed of millions of parameters requiring extensive computational capabilities. Building such huge models undermines their replicability and increases the training instability. Moreover, multi-channel data, such as images or audio, are usually processed by real-valued convolutional networks that flatten and concatenate the input, losing any intra-channel spatial relation. To address these issues, here we propose a family of quaternion-valued generative adversarial networks (QGANs). QGANs exploit the properties of quaternion algebra, e.g., the Hamilton product for convolutions. This allows to process channels as a single entity and capture internal latent relations, while reducing by a factor of 4 the overall number of parameters. We show how to design QGANs and to extend the proposed approach even to advanced models. We compare the proposed QGANs with real-valued counterparts on multiple image generation benchmarks. Results show that QGANs are able to generate visually pleasing images and to obtain better FID scores with respect to their real-valued GANs. Furthermore, QGANs save up to 75% of the training parameters. We believe these results may pave the way to novel, more accessible, GANs capable of improving performance and saving computational resources.
Can Latent Alignments Improve Autoregressive Machine Translation?
Haviv, Adi, Vassertail, Lior, Levy, Omer
Latent alignment objectives such as CTC and AXE significantly improve non-autoregressive machine translation models. Can they improve autoregressive models as well? We explore the possibility of training autoregressive machine translation models with latent alignment objectives, and observe that, in practice, this approach results in degenerate models. We provide a theoretical explanation for these empirical results, and prove that latent alignment objectives are incompatible with teacher forcing.
Automatic glissade determination through a mathematical model in electrooculographic records
Velรกzquez-Rodrรญguez, Camilo, Garcรญa-Bermรบdez, Rodolfo, Rojas-Ruiz, Fernando, Becerra-Garcรญa, Roberto, Velรกzquez, Luis
The glissadic overshoot is characterized by an unwanted type of movement known as glissades. The glissades are a short ocular movement that describe the failure of the neural programming of saccades to move the eyes in order to reach a specific target. In this paper we develop a procedure to determine if a specific saccade have a glissade appended to the end of it. The use of the third partial sum of the Gauss series as mathematical model, a comparison between some specific parameters and the RMSE error are the steps made to reach this goal. Finally a machine learning algorithm is trained, returning expected responses of the presence or not of this kind of ocular movement.
Bribery as a Measure of Candidate Success: Complexity Results for Approval-Based Multiwinner Rules
Faliszewski, Piotr, Skowron, Piotr, Talmon, Nimrod
We study the problem of bribery in multiwinner elections, for the case where the voters cast approval ballots (i.e., sets of candidates they approve) and the bribery actions are limited to: adding an approval to a vote, deleting an approval from a vote, or moving an approval within a vote from one candidate to the other. We consider a number of approval-based multiwinner rules (AV, SAV, GAV, RAV, approval-based Chamberlin--Courant, and PAV). We find the landscape of complexity results quite rich, going from polynomial-time algorithms through NP-hardness with constant-factor approximations, to outright inapproximability. Moreover, in general, our problems tend to be easier when we limit out bribery actions on increasing the number of approvals of the candidate that we want to be in a winning committee (i.e., adding approvals only for this preferred candidate, or moving approvals only to him or her). We also study parameterized complexity of our problems, with a focus on parameterizations by the numbers of voters or candidates.
Seeing Quadruple: Artificial Intelligence Leads to Discovery That Can Help Solve Cosmological Puzzles โ SciTechDaily
Four of the newfound quadruply imaged quasars are shown here: From top left and moving clockwise, the objects are: GraL J1537-3010 or "Wolf's Paw;" GraL J0659 1629 or "Gemini's Crossbow;" GraL J1651-0417 or "Dragon's Kite;" GraL J2038-4008 or "Microscope Lens." The fuzzy dot in the middle of the images is the lensing galaxy, the gravity of which is splitting the light from the quasar behind it in such a way to produce four quasar images. By modeling these systems and monitoring how the different images vary in brightness over time, astronomers can determine the expansion rate of the universe and help solve cosmological problems. With the help of machine-learning techniques, a team of astronomers has discovered a dozen quasars that have been warped by a naturally occurring cosmic "lens" and split into four similar images. Quasars are extremely luminous cores of distant galaxies that are powered by supermassive black holes.
Consistent Accelerated Inference via Confident Adaptive Transformers
Schuster, Tal, Fisch, Adam, Jaakkola, Tommi, Barzilay, Regina
We develop a novel approach for confidently accelerating inference in the large and expensive multilayer Transformers that are now ubiquitous in natural language processing (NLP). Amortized or approximate computational methods increase efficiency, but can come with unpredictable performance costs. In this work, we present CATs--Confident Adaptive Transformers--in which we simultaneously increase computational efficiency, while guaranteeing a specifiable degree of consistency with the original model with high confidence. Our method trains additional prediction heads on top of intermediate layers, and dynamically decides when to stop allocating computational effort to each input using a Figure 1: Our CAT model G can save computational resources meta consistency classifier. To calibrate our by exiting early on certain inputs--while guaranteeing early prediction stopping rule, we formulate a predictive consistency with the full model F. unique extension of conformal prediction.
A recipe for annotating grounded clarifications
Benotti, Luciana, Blackburn, Patrick
In Clarifications are crucial to robust dialogues, and Sections 4 and A we test the practical implications pragmatic factors -- notably those shaped by the of our recipe by identifying and characterizing (according world modalities situating the conversation -- have to their modalities) the clarifications in a a key role to play. Referring expressions have in corpus of long dialogues in English. In Section 5 vision a modality in which to ground clarifications we turn to the claim that clarifications are rare in concerning objects in the world (de Vries et al., dialogue datasets (Ginzburg, 2012), and that current 2017); navigation instructions have in movement data-hungry algorithms cannot learn them. We a modality in which to ground clarifications concerning argue that whether they are rare or not depends collaborative wayfinding (Thomason et al., on pragmatic factors of the conversation and the 2019). Clarifications grounded in situationally relevant modality of the grounded clarification, and discuss modalities boost the redundancy required to the impact of six such factors. After presenting learn to use language without explicit supervision, potential objections and our responses in Section 6, as they make explicit the process of negotiating the we conclude in Section 7 by noting ethical issues communicative intent. But despite its importance, raised by socioperceptive dialogue systems that work on clarification remains scattered.